# Complementary Angles Teacher Resources

Find Complementary Angles lesson plans and worksheets
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#### Grade 7, Claim 1: Concepts and Procedures Item Slide Shows

For Teachers 7th Standards
Prepare seventh graders for end-of-year assessments with a collection of nine resources packed with teacher and student-friendly slides featuring problems that address the A-I competencies. Questions are modeled after Smarter Balanced...
29 Items in Collection
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#### EngageNY Grade 7 Math Module 6: Geometry

For Teachers 6th Standards
Twenty-seven lessons make up a math module designed for seventh graders to focus on the concept of geometry. Topics include angles, triangles, parallelograms, three-dimensional figures, and measurement using volume and area. Two...
3:00
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#### Complementary Angles: Lesson

For Students 6th - 10th Standards
Complement the angle definition. The resource, a video within a basic geometry playlist, introduces the definition of complementary angles. Using the definition, the presentation finds complements of given angles.
EngageNY

#### Sine and Cosine of Complementary Angles and Special Angles

For Students 9th - 10th Standards
Building trigonometric basics here will last a mathematical lifetime. Learners expand on the previous lesson in a 36-part series by examining relationships between the sine and cosine of complementary angles. They also review the ratios...
3:18
Lesson Planet

#### Write Expressions and Determine the Measure of Complementary Angles (Example)

For Students 7th - 10th Standards
Investigate algebraic applications of complementary angles. Young scholars watch as the instructor describes and defines complementary angles. He then shows an example of finding an unknown value of x given expressions for a pair of...
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#### Complementary Angles

For Students 4th - 6th
Elementary schoolers find the missing angle in a complementary angle.  This two-page instructional activity contains six problems. Answers are provided.
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#### Complementary Angles: Corner Kick

For Students 7th - 10th Standards
Soccer is all about angles. Young mathematicians use an interactive to correctly position the path of a soccer ball so that it reaches the goal. They consider complementary angles when answering a set of challenge questions.
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#### Supplementary and Complementary Angle Pairs

For Students 7th - 10th Standards
Complement and supplement your knowledge of angles. Young mathematicians study supplementary and complementary angle pairs using an interactive. A set of challenge questions solidifies this understanding.
3:20
Lesson Planet

#### What are Complementary Angles?

For Teachers 6th - 10th
Supplementary, obtuse, acute, complementary angles. It's good to know what all of these mean, but let's focus on one at a time. Complementary angles always add up to 90 degrees. So if given one angle in a complementary angle problem, the...
3:42
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#### Find Angle Measurements Using Complementary and Supplementary Angles

For Students 6th - 8th Standards
How can geometry learners remember the difference between supplementary and complementary angles? Not only will the video explain how to remember these two angles, but it also demonstrates how to find unknown angles knowing the degree of...
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#### "I Saw the Sine"

For Teachers 9th - 12th Standards
Discover trigonometric ratios that complement each other. Using two videos, the lesson introduces the trigonometric ratios. The class discovers the relationship between the sine and cosine of complementary angles.
3:21
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#### How Do You Use Complementary Angles to Find a Missing Angle?

For Teachers 6th - 10th
Are complementary angles nice to each other? That's not what complementary means in math. Complementary angles are two angles that add up to 90 degrees and form a right triangle. So if given one value in a problem about complementary...
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#### Sine and Cosine of Complementary Angles Lesson Seed

For Teachers 9th - 11th Standards
This resource suggests various activities to establish the relationship between the sine and cosine of complementary angles. The activities have learners making conjectures based on their explorations and providing rationales to support...
1:59
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#### Write Expressions for Complementary Angles and Supplementary Angles (Basic) (Example)

For Students 7th - 10th Standards
A straightforward lesson explains the meaning of complementary and supplementary angles. The instructor uses both an algebraic representation and a numeric example to describe each angle pair.
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#### Patterns in the 30-60-90 Table

For Students 9th - 12th Standards
Sine and cosine ratios have more in common than just their names—they are complementary to each other. Using a 30-60-90 triangle, pupils create a table of the sine and cosine of the acute angles. The learners describe the relationships...
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#### Right Triangle Relationships

For Students 9th - 12th Standards
Work with sine and cosine relationships three ways. Three questions assess pupils' understanding of the trigonometric relationship between complementary angles. Learners use the value of one ratio to determine the other and the equal...
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#### Complementary Angles

For Students 7th - 10th Standards
Here's an interactive that complements your lesson plans. Users of the resource adjust one of the angles in a complementary set to see how it affects the other. A set of challenge questions assesses understanding.
9:05
Lesson Planet

#### Angles (part 2)

For Students 9th - 10th
In this second video in the series on angles, students explore the concept of supplementary and complementary angles. In addition, intersecting lines and opposite angles are explained.
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#### Angle Pairs - Reteach 14.2

For Students 4th - 5th Standards
Practice recognizing types of additive angles with a activity in which pupils review adjacent, interior and exterior, complementary, and supplementary angles and use a diagram to give examples of them. Be aware that the diagram involves...
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#### Leveled Problem Solving: Angles

For Students 4th - 6th Standards
This splendid assignment gets future engineers to compute complementary or supplementary angles in real-life applications! Once they have mastered the art of additive angles, they can apply their knowledge to help Steve, Inez, Carlotta,...
7:46
Lesson Planet

#### Angle Basics

For Students 4th - 8th Standards
Take a linear approach to acquaint the class with angles. The video introduces the idea of angles from the notion of intersecting lines. Using the idea of perpendicular lines, the resource defines right, acute, and obtuse angles along...
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#### Complementary and Supplementary Angles #1

For Students 4th - 6th Standards
Learners are given one angle measure, and then determine the corresponding supplementary or complementary angle. A reference web site is given for additional activities. This assignement can be adapted to demonstrate that angle measure...
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#### Complementary Angles (B)

For Students 7th - 9th
For this complementary angles worksheet, students use their geometry skills to identify the missing angle measurements in each set of 6 complementary angles.
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#### Complementary Angles (A)

For Students 5th - 6th
In this angles instructional activity, students solve 6 problems in which the missing angle measurement in each set of complementary angles is calculated.